The mystery of the Alienware 'allpowerful' has been pierced a few days before E3—a brand new m17x stuffed with so much power it might just cause cancer: Dual 1GB Nvidia GeForce GTX 280M graphics cards and a Intel Core 2 Extreme Quad-Core CPU for starters.

Alienware's newest 17-inch barely portable notebook, the M17, looks a whole lot like their M17x beastie, but instead of rocking Nvidia SLI, it's Alienware's first ever ATI CrossFireX notebook, with dual Radeon HD 3870 graphics cards. ATI's big point when I talked the new mobile CrossFireX with them is that they…